当DataGrid同时具有分页和排序功能时应注意在重新绑定数据源时，MyDataGrid.CurrentPageIndex=0; 下面给实现以上功能的原码，也就不多缀了aspx中包含有DataGrid和控制其数据源变化的dropdownlist DataGrid代码   <asp:datagrid id="MyDataGrid" runat="server" BorderColor="#CCCCCC" Font-Size="100%" HorizontalAlign="Center"             AutoGenerateColumns="False" OnDeleteCommand="MyDataGrid_Delete" OnSortCommand="Sort_Grid" OnPageIndexChanged="MyDataGrid_PageIndexChanged"             DataKeyField="ACC_NO" PagerStyle-Position="Bottom" PagerStyle-HorizontalAlign="Center" PagerStyle-Mode="NextPrev"             PageSize="10" AllowSorting="True" AllowPaging="True" CellPadding="4" Width="100%">             <AlternatingItemStyle BackColor="#E9E9E6"></AlternatingItemStyle>             <HeaderStyle Font-Bold="True" Wrap="False" ForeColor="White" BackColor="#999999"></HeaderStyle>             <Columns>              <asp:ButtonColumn Text="口" CommandName="Delete"></asp:ButtonColumn>              <asp:BoundColumn DataField="NO" SortExpression="NO" ReadOnly="True" HeaderText="序号"></asp:BoundColumn>              <asp:BoundColumn DataField="ID" SortExpression="ID" HeaderText="ID"></asp:BoundColumn>              <asp:BoundColumn DataField="NAME" SortExpression="NAME" HeaderText="名称"></asp:BoundColumn>              <asp:BoundColumn DataField="C_NAME" SortExpression="C_NAME" HeaderText="各科名称"></asp:BoundColumn>              <asp:BoundColumn DataField="FLG" SortExpression="FLG" HeaderText="项目"></asp:BoundColumn>             </Columns>             <PagerStyle NextPageText="下10件" PrevPageText="返回" HorizontalAlign="Center"></PagerStyle>            </asp:datagrid> dropdownlist代码 <asp:dropdownlist id="ddlWk" Runat="server" AutoPostBack="True" Enabled="False">                <asp:ListItem Value="0">东京</asp:ListItem>                <asp:ListItem Value="3">九州</asp:ListItem>                <asp:ListItem Value="8">北海道</asp:ListItem>                <asp:ListItem Value="9">四国</asp:ListItem>               </asp:dropdownlist>   aspx.cs文件代码核心如下： private void Page_Load(object sender, System.EventArgs e)   {    if(!IsPostBack)    {        Session["WP"] ="0";        ddlWk_getS();        BindGrid();    }    }   private void ddlWk_getS()   {    switch (Session["WP"].ToString())    {     case "0":ddlWk.SelectedIndex=0;      break;     case "3":ddlWk.SelectedIndex=1;      break;     case "8":ddlWk.SelectedIndex=2;      break;     case "9":ddlWk.SelectedIndex=3;      break;     default:ddlWk.SelectedIndex=0;      break;    }   }   protected void BindGrid()   {    MyDataGrid.DataSource=GetData().Tables["vCO"].DefaultView;    MyDataGrid.DataBind();    //COUNT.Text=MyDataGrid.Columns.Count.ToString();   }   /// <summary>   /// 返回Data   /// </summary>   ///<returns></returns>   private DataSet GetData()   {    string strConn=(String) ((NameValueCollection) Context.GetConfig("system.web/database"))["strConn"];    using (SqlConnection conn = new SqlConnection(strConn))    {     SqlCommand cmd = new SqlCommand("sp_C",conn);     cmd.CommandType=CommandType.StoredProcedure;     cmd.Parameters.Add("@place",SqlDbType.VarChar,2);     cmd.Parameters["@place"].Value=Session["WP"].ToString();     conn.Open();     SqlDataAdapter da = new SqlDataAdapter();     da.SelectCommand=cmd;     DataSet ds=new DataSet();     da.Fill(ds,"vCO");     Count.Text="ヒット："+ds.Tables["vCO"].Rows.Count.ToString()+"件";     return ds;    }   }   /// <summary>   ///从DataSet中除一   /// </summary>   /// <param name="sender"></param>   /// <param name="E"></param>   protected void MyDataGrid_Delete(Object sender, DataGridCommandEventArgs E)   {     String strID=MyDataGrid.DataKeys[(int)E.Item.ItemIndex].ToString();     //删除操作   }   /// <summary>   /// 分页操作   /// </summary>   /// <param name="sender"></param>   /// <param name="e"></param>   protected void MyDataGrid_PageIndexChanged(object source, DataGridPageChangedEventArgs e)   {    MyDataGrid.CurrentPageIndex=e.NewPageIndex;    BindGrid();   }   /// <summary>   /// 排序   /// </summary>   /// <param name="sender"></param>   /// <param name="e"></param>   protected void Sort_Grid(object sender, DataGridSortCommandEventArgs e)   {    DataView dv= new DataView(GetData().Tables["vCO"]);    dv.Sort= e.SortExpression.ToString();    MyDataGrid.DataSource=dv;    MyDataGrid.DataBind();   }   #region Web   override protected void OnInit(EventArgs e)   {    //   //    InitializeComponent();    base.OnInit(e);   }   /// <summary>  /// </summary>   private void InitializeComponent()   {       this.ddlWk.SelectedIndexChanged += new System.EventHandler(this.ddlWk_SelectedIndexChanged);    this.Load += new System.EventHandler(this.Page_Load);   }   #endregion   private void ddlWk_SelectedIndexChanged(object sender, System.EventArgs e)   {    Session["WP"]=ddlWk.SelectedValue;    MyDataGrid.CurrentPageIndex=0;//没有这一句，当该页码超出其他数据源的范围时会出错    BindGrid();    Response.Write( "<script language='javascript'>parent.menuframe.location.reload();</script>");   }